<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta http-equiv="X-UA-Compatible" content="ie=edge">
  <title>Document</title>
<style>
  .box{
width:600px;
height:600px;
background-color:#f00;
background: url(./image/wall.png);
  }
</style>
</head>
<body>
  <div class="box"></div>
</body>
</html>